从尼加拉瓜生产的皮革中释放的铬(III)、铬(VI)和钴。
Chromium(III), chromium(VI) and cobalt release from leathers produced in Nicaragua.
机构信息
Division of Surface and Corrosion Science, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm, Sweden.
Public Health Department, Faculty of Medical Science, National Autonomous University of Honduras, Tegucigalpa, Honduras.
出版信息
Contact Dermatitis. 2019 Mar;80(3):149-155. doi: 10.1111/cod.13165. Epub 2018 Nov 28.
BACKGROUND
Leather exposure has been associated with chromium (Cr) and cobalt (Co) contact dermatitis. Cr(VI) in leather is now restricted to <3 mg/kg in the EU. Cr(III) is not restricted.
OBJECTIVES
To analyse 29 differently coloured Cr-tanned leather samples from two Nicaraguan tanneries, and to compare their release of Cr, Cr(VI) and Co with that of leathers produced in Europe.
METHODS
Cr, Cr(VI) and Co were extracted in phosphate buffer for 3 hours at 25°C according to EN ISO 17075. Atomic absorption spectroscopy and spectrophotometry were used for detection of the metals in phosphate buffer.
RESULTS
There was no difference in total Cr or Cr(VI) release between European and Nicaraguan leathers. There was no association between Cr(VI) and total Cr release. Co was released primarily from leathers of one tannery. Cr(III) was released in significantly higher amounts than Cr(VI).
CONCLUSIONS
Future investigations and regulations should focus on Cr(III) and Co as well as on Cr(VI).
背景
皮革暴露与铬（Cr）和钴（Co）接触性皮炎有关。欧盟现在限制皮革中的六价铬（Cr(VI)）含量<3 毫克/千克，而三价铬（Cr(III)）则不受限制。
目的
分析来自尼加拉瓜两家制革厂的 29 种不同颜色的铬鞣革样品，并将其释放的 Cr、Cr(VI)和 Co 与欧洲生产的皮革进行比较。
方法
根据 EN ISO 17075，将 Cr、Cr(VI)和 Co 在 25°C 的磷酸盐缓冲液中提取 3 小时。原子吸收光谱法和分光光度法用于检测磷酸盐缓冲液中的金属。
结果
欧洲和尼加拉瓜皮革的总 Cr 或 Cr(VI)释放量没有差异。Cr(VI)与总 Cr 释放之间没有关联。Co 主要从一家制革厂的皮革中释放出来。Cr(III)的释放量明显高于 Cr(VI)。
结论
未来的研究和法规应重点关注 Cr(III)和 Co 以及 Cr(VI)。
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